Humic substance
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Humic substances are relatively recalcitrant colored organic compounds naturally formed during long-term decomposition and transformation of biomass residues. The color of humic substances varies from
Humic acid isolated from peat
Fulvic acid isolated from peat
Peat
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Peat is an accumulation of partially decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. Sphagnum moss, also called peat moss, is one
Humic substance
…from humus, which in turn comes from the Latin word humus, meaning "soil, earth". Humic substances constitute the majority of organic matter in soil, peat, coal, and sediments, and are important components of dissolved natural organic matter (NOM) in lakes (especially dystrophic lakes), rivers, and sea…
A lump of peat
Peat stacks in Südmoslesfehn (district of Oldenburg, Germany) in 2013
Peat gatherers at Westhay, Somerset Levels in 1905
Peat extraction in East Frisia, Germany in 1987